Answer:
Explanation:
Some of the factors affecting intensity are: The energetic intensity of the source (the initial volume). The distance from the source (the volume at any point along the path). Any modifying elements in the light path (air, clouds, filters, reflectors, etc.) The factors affecting the intensity of light are diffraction.
Light has three properties: Wavelength, speed, and amplitude. The wavelength determines the type of light (color, etc.). Speed is determined by whether light passes through a vacuum or some material. The more photons emitted per unit time, the greater the intensity of the light. Directly, it is the power that determines the brightness of a bulb. That is why light bulbs have a power rating, i.e. a 60W bulb is enough to light a typical bedroom. But power is determined by the current and voltage which, in turn, is determined by the current.
uses of convace, convex mirror
Answer:
The concave mirror is a converging mirror so that it is used for many purposes, It is used as a torch to reflect the light, It is used in the aircraft landing at the airports to guide the aeroplanes, It is used in shaving to get an enlarged and erect image of the face.
Explanation:
A car engine produces a force of 2000N while moving a distance of 200m in a time of 10s. What is the power developed by the engine
Does mass resists acceleration?
what is electrical energy ?
Explanation:
Electrical energy is energy derived from electric potential energy or kinetic energy. When used loosely, electrical energy refers to energy that has been converted from electric potential energy.
HOPE THIS HELPS YOU
Answer:
Hi!
Explanation:
Its kinetec energy moving by electric charges.
Distinguish between
Subsistence farming and Intensive farming
Answer:
Subsistence farming is growing food for your own and your family's direct consumption. Like a backyard vegetable garden, but with fruit, starch crops, and animals as well. Intensive agriculture is anything that really works the land hard. The inputs cost money, so it is generally only done for profit
hope it becomes helpful to you ☺️☺️
good luck
Please help me I give good points
A 6.0 kg box is at rest on a table. The static friction coefficient 1, between the box and table is 0.40, and
the kinetic friction coefficient us is 0.20. Then, a 23 N horizontal force is applied to the box.
What is the best estimate of the magnitude of the box's acceleration?
Round the answer (if non-zero) to two significant digits.
Choose 1 answer:
Answer:
B. 1.1 m/s²
good luck, i hope this helps :)
The principal ran a marathon, 26.2 miles in 3 hours. This is an example of.....
A-speed
B-velocity
C-acceleration
True or false, the hardest working muscle in the body is the gluteus Maximus?
Answer:heart
The hardest working muscle is the heart. It pumps out 2 ounces (71 grams) of blood at every heartbeat. Daily the heart pumps at least 2,500 gallons (9,450 liters) of blood. The heart has the ability to beat over 3 billion times in a person's life.
Explanation:hope this helps
Which is a benefit of strength training? O Decreased blood flow to muscles O Improved oxygen delivery Flexibility of tendons and joints O Increased lean muscle tissue
Answer:
Increased lean muscle tissue.
Explanation:
I hope this helps :) Tell me if I am wrong!
Answer:
Increased lean muscle tissue.
Explanation:
i took the test!
________ 8. The pH of a solution is a measure of the concentration of H+ ions in it. TRUE OR FALSE
Answer:
False.
Explanation:
Potential of Hydrogen is the full form of PH.
Potential of Hydrogen tells about the acidity or basicity of the solution.
The pH of a solution is a measure of the concentration of hydrogen ions [tex](H+)[/tex] ions and hydroxide ions [tex](OH-)[/tex] in a solution.
So, the given statement is false.
In the figure, if the tension in string 1 is 34 N (40 degrees to the left) and the tension in string 2 is 24 N ( to the right) what is the mass of the object shown?
Answer:
3.7 kg
Explanation:
Start off by drawing and labeling a free-body diagram for the object. I have attached an image that I drew that shows all of the relevant forces acting on the object.
On the free-body diagram, we have the tension forces (T₁ and T₂), their x and y components, and the weight force (w).
We want to start off by finding the angle theta (Θ) so that we can use this angle when using Newton's Second Law later on in the problem to calculate the mass of the object.
We can find the angle Θ by using the fact that there are no unbalanced horizontal forces acting on the object, so the net force is zero.
This means that T₁ sin(40) is equal to T₂ sin(Θ). Set them equal to each other in an equation and solve for the angle Θ. We are given the tension forces: T₁ = 34 N and T₂ = 24 N.
T₁ sin(40) = T₂ sin(Θ)34 * sin(40) = 24 * sin(Θ)Evaluate 34 * sin(40) and divide it by 24 to isolate sin(Θ).
0.9106157804 = sin(Θ)Take the inverse sine of both sides of the equation.
Θ = sin⁻¹(0.9106157804) Θ = 65.59058699°Now that we have the angle Θ, we can use this to set up an equation involving mass using Newton's Second Law.
We know that there is a weight force directed downwards on the object, and this weight force is equal to mg (mass · gravitational acceleration).
There are two forces acting upwards on the object: the x-components of the two tension forces.
Using the fact that the object is not moving vertically, we know that the net force must equal 0 (since F = ma and acceleration = 0 m/s², therefore F = 0 N).
The sum of the forces in the y-direction will be equal to 0. Setting the upwards direction to be positive and the downwards direction to be negative, we can write this equation:
∑Fᵧ = T₁ cos(40) + T₂ cos(65.59058699) - mg = 0Add mg (weight force) to both sides of the equation.
T₁ cos(40) + T₂ cos(65.59058699) = mgSubstitute 34 for T₁ and 24 for T₂.
34 * cos(40) + 24 * cos(65.59058699) = mgThe gravitational acceleration on Earth is 9.8 m/s². Substitute this value into the equation and solve for m, the mass of the object.
34 * cos(40) + 24 * cos(65.59058699) = m(9.8)Evaluate the left side of the equation.
35.96360799 = 9.8mDivide both sides of the equation by 9.8.
m = 3.669755918Round this to two significant figures since the problem gives us the tension forces to two sig figs.
m ≈ 3.7 kgThe mass of the object shown is around 3.7 kg.
Answer:
3.7 kg
Explanation:
Start off by drawing and labeling a free-body diagram for the object. I have attached an image that I drew that shows all of the relevant forces acting on the object.
On the free-body diagram, we have the tension forces (T₁ and T₂), their x and y components, and the weight force (w).
We want to start off by finding the angle theta (Θ) so that we can use this angle when using Newton's Second Law later on in the problem to calculate the mass of the object.
We can find the angle Θ by using the fact that there are no unbalanced horizontal forces acting on the object, so the net force is zero.
This means that T₁ sin(40) is equal to T₂ sin(Θ). Set them equal to each other in an equation and solve for the angle Θ. We are given the tension forces: T₁ = 34 N and T₂ = 24 N.
T₁ sin(40) = T₂ sin(Θ)
34 * sin(40) = 24 * sin(Θ)
Evaluate 34 * sin(40) and divide it by 24 to isolate sin(Θ).
0.9106157804 = sin(Θ)
Take the inverse sine of both sides of the equation.
Θ = sin⁻¹(0.9106157804)
Θ = 65.59058699°
Now that we have the angle Θ, we can use this to set up an equation involving mass using Newton's Second Law.
We know that there is a weight force directed downwards on the object, and this weight force is equal to mg (mass · gravitational acceleration).
There are two forces acting upwards on the object: the x-components of the two tension forces.
Using the fact that the object is not moving vertically, we know that the net force must equal 0 (since F = ma and acceleration = 0 m/s², therefore F = 0 N).
The sum of the forces in the y-direction will be equal to 0. Setting the upwards direction to be positive and the downwards direction to be negative, we can write this equation:
∑Fᵧ = T₁ cos(40) + T₂ cos(65.59058699) - mg = 0
Add mg (weight force) to both sides of the equation.
T₁ cos(40) + T₂ cos(65.59058699) = mg
Substitute 34 for T₁ and 24 for T₂.
34 * cos(40) + 24 * cos(65.59058699) = mg
The gravitational acceleration on Earth is 9.8 m/s². Substitute this value into the equation and solve for m, the mass of the object.
34 * cos(40) + 24 * cos(65.59058699) = m(9.8)
Evaluate the left side of the equation.
35.96360799 = 9.8m
Divide both sides of the equation by 9.8.
m = 3.669755918
Round this to two significant figures since the problem gives us the tension forces to two sig figs.
m ≈ 3.7 kg
The mass of the object shown is around 3.7 kg.
3. Bart ran 5000 meters from the cops and an average speed of 10 meters/second before he got
caught. How long did he run?
Answer:
8 minutes and 20 seconds
Explanation:
5000/10 to get the number of seconds, which is 500, then you convert 500 seconds to minutes and you get 8 minutes and 20 seconds
Electromagnetic waves from the sun reach the earth even though the space between us and the sun. Sound waves emitted by the sun cannot reach the earth. Explain why this difference?
Answer:
em waves do so because they require no medium to travel...space =vacuum)))
while sound waves that are longitudinal waves...require medium to travel......so in space it has vacuum.....it can't travel..
Transforme: a) 2 km em m b) 1,5 m em mm c) 5,8 km em cm d) 0,4 m em mm e) 27 mm em cm f) 126 mm em m g) 12 m em km
Answer:
a) 2000 m
b) 1500 mm
c) 580000 cm
d) 400 mm
e) 2.7 cm
f ) 0.126 m
g) 0.012 km
Explanation:
Transform
a) 2km to m
1 km = 1000m
hence : 2 km = 2 * 1000 = 2000 m
b) 1.5m to mm
1 m = 1000 mm
hence: 1.5 m = 1.5 * 1000 = 1500 mm
C) 5.8 km to cm
1 km = 100000 cm
hence ;5.8 km = 5.8 * 100000 = 580000 cm
D) 0.4 m to mm
1 m = 1000 mm
hence; 0.4 m = 0.4 * 1000 = 400 mm
E) 27 mm to cm
1 mm = 0.1 cm
hence ; 27 mm = 27 * 0.1 = 2.7 cm
F) 126mm to m
1 mm = 0.001 m
hence ; 126 mm = 126 * 0.001 = 0.126 m
G) 12m to Km
1 m = 0.001 km
hence ; 12 m = 12 * 0.001 = 0.012 km
What type of relationship exists between the rams?
Answer:
The relationship the exist between the rams is a mild one.
Explanation:
A sixth grader moves down the hall at 1.2 m/s. When he sees a bunch of eighth graders coming, he
begins to run. After 3.2 s, he is moving at 3,6 m/s. What is his acceleration?
Answer:
0.75m/s^2
Explanation:
3.6-1.2=2.4 m/s (Change in velocity)
2.4/3.2=0.75 m/s/s or m/s^2
a horizontal applied force of magnitude 25 N acts on a block sliding on a horizontal surface. The force of friction between the block and the surface has magnitude 8 N. If the direction of the applied force is reversed which of the following is true?
A. the magnitude of the velocity of the block will remain constant.
B. the magnitude of the acceleration of the block decreases
C. The magnitude of the net force on the block increases as compared to before.
D. the magnitude of the net force on the block will remain the same as before
' A ' and ' D ' are both correct statements.
A wave has a wavelength of 0.02m and period of 8.0*10^-2 seconds. calculate it's speed. (showing working)
Answer:
[tex]v = 0.25m/s[/tex]
Explanation:
Given
[tex]\lambda = 0.02m[/tex] --- Wavelength
[tex]T = 8.0 * 10^{-2}s[/tex] --- Period
Required
Determine the velocity of the wave
This is calculated using:
[tex]v = \frac{\lambda}{T}[/tex]
[tex]v = \frac{0.02m}{8.0*10^{-2}s}[/tex]
[tex]v = \frac{0.02m}{8.0*0.01s}[/tex]
[tex]v = \frac{0.02m}{0.08s}[/tex]
[tex]v = 0.25m/s[/tex]
Hence, the velocity is 0.25m/s
What are the energy transformations for a battery-powered radio?
Answer:
hope that helps
Explanation:
sound energy to chemical energy.
electrical energy to sound energy.
sound energy to electrical energy.
what is the average speed of the object at 8 seconds accelerate without speeding up
because i said so
the answer is 80 diveded by 8 equalzzzz
Can someone please help me?
Please also explain how you got the net force, thank you.
The questions are in the picture i attached below.
Answer:
unbalanced 1st answer
right 2nd answerAnswer:
hi, your answers are correct
Explanation:
______ images are obtained when the plane mirror are kept parallel to the each other
.infinite.
&
also
.virtual.
show all work. a bus travels 100km/hr. it takes 6 hours to get from seattle to portland. how far away are the two cities?
Answer:
There would be 600km
Explanation:
what is linear magnification
Answer:
Linear magnification refers to the ratio of image length to object length measured in planes that are perpendicular to the optical axis. A negative value of linear magnification denotes an inverted image.
Explanation:
Answer:
i hope it help
Explanation:
stay happy and safe
A 40N force is applied to a spring constant of 100 N/m how far can this spring be compressed by the force
Answer:
Extension, e = 0.4 meters
Explanation:
Given the following data;
Force = 40N
Spring constant, k = 100N/m
To find the extension;
Force = spring constant * extension
Substituting into the equation, we have
40 = 100 * extension
Extension, e = 40/100
Extension, e = 0.4 meters
Therefore, the spring can be compressed by the force over a distance of 0.4 meters.
Everything is made up of blank and all matter is made of blank. There are three basic parts of atom: protons,neutrons, and blank. The blank and blank are located in the center of the atom; this area is called the blank. The electrons are found orbiting around the nucleus in an area we call the blank. They are organized into levels within the electron cloud, and the outermost level is referred to as the blank level.
Please answer fast!!!
which of the following is an example of unbalanced force?
1. A chair leaning on a wall
2. A stroller being pushed
3. A ball on the grass
4. A book sitting on a table
Answer:1. A chair leaning on a wall
Explanation:
How long would it take for a car to travel 22km if it has an average speed of 55 km/hr
Distance = (speed) x (time)
Time = (distance) / (speed)
Time = (22 km) / (55 km/hr)
Time = (22/55) (hr)
Time = 0.4 hour (that's 24 minutes)
How much work is performed when a 50 kg crate is pushed 15 m with a force of 20 N?
Answer:
300 jules
Explanation:
Assignment
1. Write a conclusion which can be deduced from each pair of statements.
a) Leona lives in 100 Mile House. 100 Mile House is in British Columbia.
B.Joan is taller than Stefan. Stefan is taller than Patrick.
c) The sides of a rhombus are equal. PQRS is a rhombus.
d) Prime numbers have two factors. 13 is a prime number.
Answer:
1.100 Mile House is a town and district municipality located in the South Cariboo region of central British Columbia.
2.Joan is taller than Stefan. Stefan is taller than Patrick. Joan is taller than Patrick
3.the sides of rhombus are equal.
4.A prime number has exactly two factors, 1 and itself. For example, 13 is a prime number because the only factors of 13 are 1 and 13.